Data is from the most recent year available. Dashes indicate missing data. Tourism is defined using the International Standard Industrial Classification of All Economic Activities (ISIC Rev. 4) at the 4-digit level; see the methodology box for details. The chart also highlights the sub-industry for hotels and restaurants due to its significant share of the tourism sector in many countries and the greater availability of data at the 1-digit level (it is defined using ISIC rev. 3 section H or ISIC rev. 4 section I).